WorldCat Identities

Nakato, Tatsuaki

Works: 47 works in 120 publications in 1 language and 541 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Originator, Editor, Other
Classifications: TC175.2, 627.042
Publication Timeline
Most widely held works by Tatsuaki Nakato
Unconventional energy sources for ice control at lock and dam installations by Tatsuaki Nakato( Book )

7 editions published in 1992 in English and held by 100 WorldCat member libraries worldwide

Operation of lock and dam installations is made troublesome and hazardous by ice growth along lock walls and by freezing of gates to ice covers. Since considerable amounts of power are required for ice control, lock operators are interested in utilizing economical power sources other than that generated by commercial utilities. This study attempted to determine the feasibilities of using several unconventional power sources for ice control at navigation locks and dams. Considered were sensible heat from groundwater, solar power, wind power and portable hydroelectric sources. Only portable hydroelectric power is feasible. Groundwater is at best of marginal feasibility, and solar and wind power sources are unreliable
Investigation of the operating characteristics of the Iowa sediment concentration measuring system by Frederick A Locher( Book )

9 editions published between 1974 and 1976 in English and held by 87 WorldCat member libraries worldwide

This report presents results of an investigation conducted to evaluate the capabilities and limitations of the Iowa Sediment Concentration Measuring System (ISCMS). The manner in which the ISCMS responds to a group of particles and to a single particle is presented. Specifically, problems with non-uniformities in the transducer field and problems created by inadequate frequency response are discussed. The results of tests conducted in an oscillatory flow facility are evaluated and the use of the ISCMS for measuring the instantaneous suspended sediment concentration is reviewed. Recommendations for improvement of the instrument are also suggested
Issues and directions in hydraulics : proceedings of an Iowa hydraulics colloquium, Iowa City, Iowa, USA, 22-24 May 1995 by Iowa Hydraulics Colloquium( Book )

8 editions published in 1996 in English and held by 60 WorldCat member libraries worldwide

A numerical model for flow and sediment transport in alluvial-river bends by Tatsuaki Nakato( Book )

5 editions published in 1983 in English and held by 28 WorldCat member libraries worldwide

Closed-form mathematical models are formulated for the rate of development and strength of secondary current, and for bed topography in meandering, erodible-bed streams of arbitary plan form. The formulations utilize conservation of flux-of-moment-of momentum as the additional relation required to complete the formulation for the radial bed-shear stress. The secondary-flow-velocity calculation was uncoupled from the calculation of the radial mass-shift velocity and streamwise velocity distributions, which were obtained from the depth-integrated equations expressing conservation of mass and streamwise momentum. Numerical simulations were made for one laboratory flow and two Sacramento River flows with constant centerline curvature. Good agreement was obtained between measured and computed distributions of flow and depth-averaged streamwise velocity. (Author)
Field study and tests of several one-dimensional sediment-transport computer models for Pool 20, Mississippi River by Tatsuaki Nakato( Book )

4 editions published in 1981 in English and held by 26 WorldCat member libraries worldwide

To test the applicability of various one-dimensional sediment-transport numerical models of movable-bed channels to Pool 20 to the Mississippi River, detailed field data were first collected, and several numerical models were subsequently evaluated using these field data. Chapter I describes the detailed results from a sediment sampling field study conducted in 1978 near Buzzard Island (RM 347-55) in Pool 20 of the Mississippi River. Variations in the longitudinal and transverse distributions are presented for various flow quantities and sediment characteristics, and are analyzed in connection with the prevalent shoaling problem in the Buzzard Island study reach. Chapter II evaluates the performance of four mathematical simulation models which used the data from a complimentary field study conducted in 1976 to establish the initial conditions when predicting the 1978 conditions. The four models evaluated were: (1) the HEC-6 model provided by the Hydrologic Engineering Center, U.S. Army Corps of Engineers; (2) the SUSR; (3) UUWSR models employed at the Colorado State University; and (4) the CHAR2 model used by the Sogreah consulting firm in Grenoble, France. (Author)
Field study of sediment transport characteristics of the Mississippi River near Fox Island (RM-355-6) and Buzzard Island (RM-349-50) by Tatsuaki Nakato( Book )

6 editions published in 1977 in English and held by 23 WorldCat member libraries worldwide

The field study was conducted in order to obtain a better understanding of the flow and sediment-transport mechanisms responsible for the recurrent shoaling that has been experienced in the vicinities of Fox Island (RM-355-6)and Buzzard Island (RM-349-50) in Pool 20 between Keokuk, Iowa, and Canton, Missouri, in the Mississippi River. Three sets of detailed data on transverse and streamwise distributions of flow velocity, suspended sediment discharge, bed-load discharge, bed-material properties, and flow depth were obtained for the high, intermediate, and low river stages during the period between May and September, 1976. The field data were used to establish empirical relationships between the sediment transport rates and hydraulic quantities in the study reaches. Based on the empirical sediment discharge formulas, closures of some side-channels to increase-transport capacity in the main channel of the study reaches have been suggested. (Author)
Model tests of the proposed intake structure of the Quad-Cities nuclear power plant by Tatsuaki Nakato( Book )

6 editions published in 1979 in English and held by 22 WorldCat member libraries worldwide

Assessment of available field sedimentation data for GREAT-II watershed by Tatsuaki Nakato( Book )

5 editions published in 1978 in English and held by 21 WorldCat member libraries worldwide

An inventory study concerning available stream sedimentation and flow data for the GREAT II (Great River Environmental Action Team II) watershed was conducted for the Sediment and Erosion Work Group of GREAT II. The study area covered the Upper Mississippi River and its tributaries between Guttenberg, IA, and Saverton, MO. These data were utilized to obtain rough estimates of annual sediment yields at individual sediment sampling stations by simple correlating monthly averaged suspended-sediment discharges with monthly averaged stream discharges. Based on these estimates, major sediment source areas were identified, and recommendations regarding installation of new sediment sampling stations for further baseline data were made. A review of some existing methodologies in estimating sediment yields also was made, and a plan of study to determine quantities of sediment delivered by tributary sources into the Mississippi River was proposed. (Author)
Detailed model study of pump-approach flows for the Lake Chicot pumping plant by Tatsuaki Nakato( Book )

7 editions published in 1977 in English and held by 19 WorldCat member libraries worldwide

A 1:24 Froude-scale model of the proposed Lake Chicot Pumping Station was constructed and utilized to identify and to correct hydraulically objectionable features of the flows in the pump sumps. The model tests showed that the flows from the plant forebay generally enter the individual pump bays with a strong transverse component of velocity and produce an intense captive eddy on the lee side of each pump-bay partition wall. The transverse velocity resulted from geometric constraints imposed on the plant configuration. In order to achieve better pump approach-flow conditions trash racks with relatively deep vertical bars which functioned as turning vanes were proposed. A 1:10-scale sump model then was built to test for model-scale effects in the trash-rack tests, and an extensive study was conducted to obtain an improved sump configuration which would minimize any vortex-related problems in and around pump suction bells. The modified sump configuration has small clearance between the pump bell and sump back-wall; converging sidewalls; and a floor mounted splitter plate (vortex breaker) beneath the pump. (Author)
Model investigation of intake-shoaling and pump-vibration problems : Iowa Generation Council Bluffs Unit 3 circulating-water intake by Tatsuaki Nakato( Book )

5 editions published in 1984 in English and held by 18 WorldCat member libraries worldwide

Sediment-budget study for the upper Mississippi River, GREAT-II reach by Tatsuaki Nakato( Book )

3 editions published in 1981 in English and held by 17 WorldCat member libraries worldwide

Model study of the Lake Chicot Pumping Plant by Tatsuaki Nakato( Book )

3 editions published in 1976 in English and held by 14 WorldCat member libraries worldwide

Geomorphic documentation of the Missouri River reach between Nebraska City and Omaha, Nebraska: RM562 - RM612 by Tatsuaki Nakato( Book )

3 editions published in 1987 in English and held by 7 WorldCat member libraries worldwide

An illustrated guide for monitoring and protecting bridge waterways against scour by R Ettema( Book )

1 edition published in 2006 in English and held by 6 WorldCat member libraries worldwide

This report is a well illustrated and practical Guide intended to aid engineers and engineering technicians in monitoring, maintaining, and protecting bridge waterways so as to mitigate or prevent scour from adversely affecting the structural performance of bridge abutments, piers, and approach road embankments. Described and illustrated here are the scour processes affecting the stability of these components of bridge waterways. Also described and illustrated are methods for monitoring waterways, and the various methods for repairing scour damage and protecting bridge waterways against scour. The Guide focuses on smaller bridges, especially those in Iowa. Scour processes at small bridges are complicated by the close proximity of abutments, piers, and waterway banks, such that scour processes interact in ways difficult to predict and for which reliable design relationships do not exist. Additionally, blockage by woody debris or by ice, along with changes in approach channel alignment, can have greater effects on pier and abutment scour for smaller bridges. These considerations tend to cause greater reliance on monitoring for smaller bridges. The Guide is intended to augment and support, as a source of information, existing procedures for monitoring bridge waterways. It also may prompt some adjustments of existing forms and reports used for bridge monitoring. In accord with increasing emphasis on effective management of public facilities like bridges, the Guide ventures to include an example report format for quantitative risk assessment applied to bridge waterways. Quantitative risk assessment is useful when many bridges have to be evaluated for scour risk and damage, and priorities need to be determined for repair and protection work. Such risk assessment aids comparison of bridges at risk. It is expected that bridge inspectors will implement the Guide as a concise, handy reference available back at the office. The Guide also likely may be implemented as an educational primer for new inspectors who have yet to become acquainted with waterway scour. Additionally, the Guide may be implemented as a part of process to check whether existing bridge-inspection forms or reports adequately encompass bridge-waterway scour
Wave entrainment of sediment from rippled beds( Book )

1 edition published in 1977 in English and held by 5 WorldCat member libraries worldwide

Wave-induced sediment entrainment from rippled beds by Tatsuaki Nakato( )

2 editions published between 1974 and 1983 in English and held by 5 WorldCat member libraries worldwide

Hydraulic-laboratory model studies of the circulating-water pump-intake structure, Florida Power Corporation, Crystal River Units 4 and 5 by Tatsuaki Nakato( Book )

2 editions published in 1988 in English and held by 5 WorldCat member libraries worldwide

Hydraulic model investigation of turbine-approach flow : Five-In-One Dam hydroelectric installation, Cedar Rapids, Iowa by Tatsuaki Nakato( Book )

3 editions published in 1985 in English and held by 5 WorldCat member libraries worldwide

Hydraulic model studies of circulating-water ocean-intake velocity caps : Florida Power & Light Company's St. Lucie Power Plant by Tatsuaki Nakato( Book )

2 editions published in 1990 in English and held by 4 WorldCat member libraries worldwide

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  Kids General Special  
Audience level: 0.73 (from 0.63 for Unconventi ... to 0.88 for Hydraulic ...)

John F. Kennedy student paper competition and specialty seminar summaries : proceedings of the John F. Kennedy student paper competition and specialty seminar summaries : the 27th Congress of the International Association for Hydraulic Research : San Francisco, California, August 10-15, 1997
English (85)